Caution:The repeatly connect and disconnect the Nylon or PU Hose into Brass Nickel-Plated Push in Fittings ,which will cause the Scratches covered with Nylon or PU Hose.The direct result is leakage on fittings, the correct way is cut off the scratched Nylon or PU Hose end and insert it again to avoid the leakage.

Contact us if you need more details on Non-Return Air Flow Valve. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Air Valves、Air Flow Valve. If these products fail to match your need, please contact us and we would like to provide relevant information.